Turbogenerator



FIG. 1 is right front perspective view of a turbogenerator showing our design thereof;

FIG. 2 is a left rear perspective view thereof;

FIG. 3 is a front elevation view thereof; and,

FIG. 4 is a right side elevation view thereof, the left side being a mirror image.

The bottom of the turbogenerator forms no part of the claimed design. 

The ornamental design for a turbogenerator, as shown and described. 